Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Gramado (50% of total searches to Serra Gaucha). The next most popular destination is Bento Gonçalves (50%).
KAYAK users have found double rooms in Serra Gaucha for as cheap as S$ 50 (Bento Gonçalves) in the last 3 days. The average price is S$ 103.